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Merge pull request #428 from antonvw/317-improve-lilypond-lexer
317 improve lilypond lexer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,219 @@ | ||
| //////////////////////////////////////////////////////////////////////////////// | ||
| // Name: lex-lilypond-util.h | ||
| // Purpose: Implementation of class lilypond | ||
| // Author: Anton van Wezenbeek | ||
| // Copyright: (c) 2023 Anton van Wezenbeek | ||
| //////////////////////////////////////////////////////////////////////////////// | ||
|
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| #pragma once | ||
|
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| namespace Scintilla | ||
| { | ||
| /// Offers some general methods. | ||
| class lilypond | ||
| { | ||
| public: | ||
| /// Static interface | ||
|
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| static bool is_letter(int ch); | ||
|
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| /// Other methods | ||
|
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| /// Constructor. | ||
| lilypond(LexAccessor& s) | ||
| : m_styler(s) | ||
| { | ||
| ; | ||
| } | ||
|
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| bool is_special(char& ch, Sci_Position& no) const; | ||
| bool is_tag_valid(Sci_Position& i, Sci_Position l) const; | ||
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| bool last_word_check( | ||
| Sci_Position start, | ||
| const char* needle, | ||
| const std::vector<std::string>& next, | ||
| Sci_Position length, | ||
| int& state) const; | ||
| bool last_word_is(Sci_Position start, const char* needle) const; | ||
| bool last_word_is_match_env(Sci_Position pos) const; | ||
|
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| bool next_not_blank_is(Sci_Position i, char needle) const; | ||
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| private: | ||
| LexAccessor& m_styler; | ||
| }; | ||
|
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| // inline implementation lex_rfw_access | ||
|
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| inline bool lilypond::is_letter(int ch) | ||
| { | ||
| return IsASCII(ch) && isalpha(ch); | ||
| } | ||
|
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| inline bool lilypond::is_special(char& ch, Sci_Position& i) const | ||
| { | ||
| if ( | ||
| (ch == '#') || (ch == '$') || (ch == '%') || (ch == '&') || (ch == '_') || | ||
| (ch == '{') || (ch == '}') || (ch == ' ')) | ||
| { | ||
| m_styler.ColourTo(i + 1, SCE_L_SPECIAL); | ||
| i++; | ||
| ch = m_styler.SafeGetCharAt(i + 1); | ||
| return true; | ||
| } | ||
|
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| return false; | ||
| } | ||
|
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| inline bool lilypond::is_tag_valid(Sci_Position& i, Sci_Position l) const | ||
| { | ||
| while (i < l) | ||
| { | ||
| if (m_styler.SafeGetCharAt(i) == '{') | ||
| { | ||
| while (i < l) | ||
| { | ||
| i++; | ||
| if (m_styler.SafeGetCharAt(i) == '}') | ||
| { | ||
| return true; | ||
| } | ||
| else if ( | ||
| !is_letter(m_styler.SafeGetCharAt(i)) && | ||
| m_styler.SafeGetCharAt(i) != '*') | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
| else if (!isblank(m_styler.SafeGetCharAt(i))) | ||
| { | ||
| return false; | ||
| } | ||
| i++; | ||
| } | ||
| return false; | ||
| } | ||
|
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| inline bool lilypond::next_not_blank_is(Sci_Position i, char needle) const | ||
| { | ||
| while (i < m_styler.Length()) | ||
| { | ||
| if (char ch = m_styler.SafeGetCharAt(i); !isspace(ch) && ch != '*') | ||
| { | ||
| return ch == needle; | ||
| } | ||
| i++; | ||
| } | ||
| return false; | ||
| } | ||
|
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| inline bool lilypond::last_word_check( | ||
| Sci_Position start, | ||
| const char* needle, | ||
| const std::vector<std::string>& checks, | ||
| Sci_Position lengthDoc, | ||
| int& state) const | ||
| { | ||
| Sci_Position match = start + 3; | ||
|
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| if (last_word_is(match, needle)) | ||
| { | ||
| match++; | ||
|
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| if (is_tag_valid(match, lengthDoc)) | ||
| { | ||
| if (checks.empty()) | ||
| { | ||
| if (last_word_is_match_env(match)) | ||
| { | ||
| state = SCE_L_COMMAND; | ||
| return true; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| for (const auto& w : checks) | ||
| { | ||
| if (last_word_is(match, std::string("{" + w + "}").c_str())) | ||
| { | ||
| m_styler.ColourTo(start - 1, state); | ||
| state = SCE_L_COMMAND; | ||
| return true; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| return false; | ||
| } | ||
|
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| inline bool lilypond::last_word_is(Sci_Position start, const char* needle) const | ||
| { | ||
| const Sci_PositionU l = static_cast<Sci_PositionU>(strlen(needle)); | ||
| const Sci_Position ini = start - l + 1; | ||
|
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| char s[32]; | ||
|
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| Sci_PositionU i = 0; | ||
| while (i < l && i < 31) | ||
| { | ||
| s[i] = m_styler.SafeGetCharAt(ini + i); | ||
| i++; | ||
| } | ||
| s[i] = '\0'; | ||
|
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| return (strcmp(s, needle) == 0); | ||
| } | ||
|
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| inline bool lilypond::last_word_is_match_env(Sci_Position pos) const | ||
| { | ||
| Sci_Position i, j; | ||
| char s[32]; | ||
|
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| if (m_styler.SafeGetCharAt(pos) != '}') | ||
| return false; | ||
|
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| for (i = pos - 1; i >= 0; --i) | ||
| { | ||
| if (m_styler.SafeGetCharAt(i) == '{') | ||
| break; | ||
| if (pos - i >= 20) | ||
| return false; | ||
| } | ||
|
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| if (i < 0 || i == pos - 1) | ||
| return false; | ||
|
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| ++i; | ||
| for (j = 0; i + j < pos; ++j) | ||
| s[j] = m_styler.SafeGetCharAt(i + j); | ||
|
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| s[j] = '\0'; | ||
| if (j == 0) | ||
| return false; | ||
|
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| if (s[j - 1] == '*') | ||
| s[--j] = '\0'; | ||
|
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| for (const auto& word : std::vector<std::string>{ | ||
| "align", | ||
| "alignat", | ||
| "flalign", | ||
| "gather", | ||
| "multiline", | ||
| "displaymath", | ||
| "eqnarray", | ||
| "equation"}) | ||
| { | ||
| if (word == s) | ||
| { | ||
| return true; | ||
| } | ||
| } | ||
|
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| return false; | ||
| } | ||
| }; // namespace Scintilla |
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